Synthesis and Properties of Tellurinic Anhydride鈥揟ellurone Adducts

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• 作者：Makoto Oba ; Kozaburo Nishiyama ; Shinichi Koguchi ; Shigeru Shimada ; Wataru Ando
• 刊名：Organometallics
• 出版年：2013
• 出版时间：November 11, 2013
• 年：2013
• 卷：32
• 期：21
• 页码：6620-6623
• 全文大小：245K
• 年卷期：v.32,no.21(November 11, 2013)
• ISSN：1520-6041

文摘

The synthesis and characterization of stable tellurinic anhydride鈥搕ellurone adducts are reported. Treatment of aryltellurinic anhydride with diaryl tellurone gave pentacyclotelluroxane consisting of two molecules each of the starting tellurium oxides. The bulky aromatic substituents attached to the tellurium atoms efficiently prevent further aggregation and enable full characterization using multinuclear (¹H, ¹³C, and ¹²⁵Te) NMR and IR spectroscopy as well as elemental analysis. For (TipTe)₄(Tip₂Te)₂O₁₀ (3TT, Tip = 2,4,6-triisopropylphenyl), the molecular structure was unambiguously determined by an X-ray crystallographic analysis. To estimate the dissociation energies of the tellurinic anhydride鈥搕ellurone adducts, density functional theory calculations were performed, and it was found that the adducts are highly stabilized by forming a four di-渭-oxo bridge structure.